[TNL-6026] Item bank SR help text moved to ARIA-label + appropriate role is set up.
[TNL-6026] Item bank SR help text moved to ARIA-label + appropriate role is set up.

edx-solutions/xblock-drag-and-drop-v2,edx-solutions/xblock-drag-and-drop-v2,edx-solutions/xblock-drag-and-drop-v2,edx-solutions/xblock-drag-and-drop-v2